闷闷不乐是大病的先兆,目前,医学界越来越倾向这种说法。医学专家认为,笑能锻炼肌肉、解除头疼、降低血压,使呼吸和睡眠正常。笑能使更多的激素进入血液,促进新陈代谢。为此,美国、瑞典等许多医院已经建立了“笑疗室”。笑,还能提高工作效率。所谓笑与严肃的事情不相容的说法,最近被美国加利福尼亚大学的一项 Sullen is a harbinger of serious illness, at present, the medical community more and more inclined to this view. Medical experts believe that laughter can exercise muscles, relieve headaches, lower blood pressure, breathing and sleep properly. Laughter can make more hormones into the blood, promote metabolism. To this end, the United States, Sweden and many other hospitals have established a “laughter room.” Laugh, but also improve work efficiency. The so-called laugh and serious things incompatible argument, recently being a University of California